<div id="abort-on-demo">
  <div>
    <button mat-raised-button color="accent" (click)="startTour()">
      Start tour
    </button>
  </div>
  <button mat-raised-button id="add-element" (click)="addElement()">
    Add element
  </button>
  <h3 id="added-element" *ngIf="displayElement">Hello world</h3>
</div>
